Cost of Class.forName()

[mohamed zafer]

Hello There,
How efficient is the usage of
Class class = Class.forName("MyClass");
class.getInstance();
to create a class dynamically.
Mohamed Zafer

[Thomas Smets]

It's much slower than static instaciation but ... it's dynamic as you said !
You could create a little script creating thousands of classes (see below) & instanciating them one after the other ?
Or just try to access all the instances from the java / javax package.
Perl or Python are good at that
In the example here below, I used innerclasses but I am not sure it is the best approaches.
If you can do it also with normal classes.
Rgds,
Thomas,

  
package test.lang;
public class InstanciationTiming
{
  public static String[] ClassNames
  = {"O0", "O1", "O2", "O3", "O4", "O5", "O6", "O7", "O8", "O9"};
  public void testDynamic()
  {
    // Do the testing & Timing here
  }
    
  testStatic()
  {
    // Do the testing & Timing here
  }
/** 
  *
  */
  public static void main (String[] args)
  {
    if (args.length == 0)
      System.exit ();
      
    if (args[0].equals("1"))  
      testDynamic();
    else
      testStatic();  
  }
    
  public class O0 {}
  public class O1 {}
  public class O2 {}
  public class O3 {}
  public class O4 {}
  public class O5 {}
  public class O6 {}
  public class O7 {}
  public class O8 {}
  public class O9 {}  
}